Terminal for wire cables



Dec. 26, 1933. E. l. SCHWARZ 1,941,113

TERMINAL FOR WIRE CABLES Filed March 25,1933

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' INVENTOR ATTORNEY Patented Dec. 26, 1933 untrue STATES PATENT OFFICE TERMINAL FOR WIRE CABLES Ernest I. Schwarz, Bronx, N. Y.

Application March 25, 1933. Serial No. 662,786 5 Claims. (01. 24-126) My invention relates more particularly to those wire cables which are used in the braking systems of automobiles, although it will be perfectly apparent to persons skilled in the art from the hereinafter contained description that the terminal is applicable to any cable where it is desirable to sustain a severe tension.

It is well known in the industry that a great deal of difiiculty is experienced due to the fact that the terminals employed fail to hold. Moreover, they are extremely difficult to put on the cables and therefore must be put on by the manufacturer andas a consequence are not adaptable for general service use. The result of this condition renders it necessary for the service man to carry in stock a large variety of cables of different lengths which increases his investment and if he happens to be out of the cable of the correct length for the particular car which comes in for service there is nothing for the owner to do but to wait until he can send to the factory for a cable.

My invention has'for its object to provide a cable terminal which can be put upon the end of a cable by the service man and which when properly assembled will hold the severest tension that can be put upon it. I have found in practice that it is possible to subject my terminal to so great a strain that the cable itself will break without the terminal letting go.

My means of accomplishing the foregoing objects may be more readily understood by having reference to the accompanying drawing which is hereunto annexed and is a part of this specification in which- 7 Fig. l is an elevation of a pair of terminals showing male and female connections;

Fig. 2 is a vertical sectional view showing the interior of the terminals;

Fig. 3 is a view showing the method of attaching the terminals where the strands of the cable have been bent back upon themselves and the tool 4 turning the strands back upon themselves;

Fig. 4 shows the tool shown in Fig. 3 in position when the strands have been bent back upon themselves, a compressing tool being shown im mediately above the end of the cable; and

Fig. 5 shows the compressing tool driven in, to compress the strands forming the cable against the collar.

Similar reference numerals refer to similar parts throughout the entire description.

As shown in the drawing the cable 1, has a collar 2, slipped over it and placed adjacent its end, this collar is preferably made of copper,

although it may be found in some cases desirable to use some other type of ductile material. In practice, however, I have found that copper gives the most satisfactory results.

The strands 3 of the cable 1 are first bent outwardly to the position clearly seen in Fig. 3. A tool 4, having an opening 5 which is just of sufficient size so as to permit the strands 3 to be reversed or bent back upon themselves into the position shown in Figs. 3, 4 and 5 and to lie between the collar 2 and the wall of the opening 5, this opening is preferably provided with a countersunk portion 6 to facilitate the reversing of the strands 3. After the tool 4 has been forced over the end of the cable to the position shown in Fig. 4, a second tool 7, which is provided with a conoidal portion 8 is forced into the axial center of the cable as clearly seen in Fig. 5. The tools 4 and '7 are then removed and a bushing 10 having a, reduced neck or stem 11 which provided with external threads, is then placed on the cable and moved longitudinally thereon .until its end 12 abuts the collar 2. A sleeve 13 provided with internal threads is then screwed upon the threads on the reduced neck 11 of the $0 bushing 10. A plug 14 is provided with a reduced portion 15, which is provided with threads which are fitted to and coincide with the internal threads in the sleeve 13 is then screwed into the sleeve 13. This plug carries a conoidal member 35 16 which fits the. conoidal depression formed by the tool '7 in the axial center of the cable.

The bushing 10 and the plug 14, are preferably provided with hexagonal portions for the purpose of receiving a wrench.

It will be apparent from the foregoing description that by tightening the bushing 10, and the plug 14, in the sleeve 13, that the strands 3 will be compressed tightly between the internal threads in the sleeve 13 and the soft copper collar 2, while the other strands of the cable will be compressed between the soft collar 2 and the conoidal member 16. In this manner Iam able to form a terminal for the end of cableswhich will hold so securely that the cable will break before the terminal will let go.

In the right hand of Fig. 2 I have shown the strands 3 in elevation; then in the left hand portion in the same figure, the cable collar and strands are in section. It will be seen that the plug 14 may be constructed with either male or female joint as desired.

' Although I have shown in some specific detail the structure for my terminal and the manner 01' forming it, it will be apparent to persons skilled in the art that other means of forming it may be employed, and l: wish to be understood as fur= nishing the description and the drawing solely for the purpose of showing the preferred i'orm of embodiment of my invention and do not desire to be limited thereto except as to such limitations as may appear in the hereinafter contained claims.

Having described my invention what I regard as new and desire to secure by Letters Patent is:

1. A terminal for wire cables comprising, a wire cable, a copper collar adjacent the end of said cable, the strands beyond said collar being reversed and compressed against the outside of said collar, a bushing having a central opening which fits said cable, the end of said bushing abutting the said collar, threads on the outside of said bushing, an internally threaded sleeve fitted to said threads, a threaded plug fitted to said sleeve, a conoidal member on said plug, said conoidal member extending well into the collar between the strands of the cable whereby the tightening of the bushing will compress the cable strands against the inside of said collar and the conoidal portion, and the reversed strands intermediate the outside of the collar and the sleeve.

2. A terminal for wire cables comprising, a wire cable, a collar formed of ductile material adjacent the end of said cable, the strands beyond said collar being reversed and compressed against the outside of said collar, a bushing having a central opening which fits said cable, the end of said bushing abutting the said collar, threads on the outside of said bushing, an internally threaded sleeve fitted to said threads. a threaded plug fitted to said sleeve, a conoidal member on said plug, said conoidal member extending well into the collar between the strands oi the cable whereby the tightening of the bushing will compress the cable strands against the inside of said collar and the conoidal portion, and the reversed strands intermediate the outside oi the collar and the sleeve.

3. A terminal ior wire cables comprising, a wire cable, a collar termed oiductile material mounted on said cable adjacent its end, the

earns strands of the cable beyond said collar being reversed and compressed against the outside of said collar, 2. bushing on said cable, the end of which abuts said collar, threads on the outside of said bushing and an internally threaded sleeve mounted thereon, means fitted to said sleeve and extending well into the collar between the strands of the cable and compressing them against the collar and compressing the reversed strands intermediate the outside of the collar and the inside of said sleeve when moved longitudinally with respect to said collar.

4. A terminal for wire cables comprising, a wire cable, a collar formed of ductile material mounted on said cable adjacent its end, the strands of the cable beyond said collar being reversed and compressed against the outside of said collar, a bushing on said cable, the end of which abuts saidcollar, threads on the outside of said bushing and an internally threaded sleeve mounted thereon, means fitted to said sleeve, said means entering well into the collar between the strands of the cable and compressing them against the collar and compressing the reversed strands intermediate the outside of the collar and the inside of said sleeve when moved longitudinally with respect to said collar, there being a conoidal recess in the center of said reversed strands which receives said means.

5. A terminal for wire cables comprising, a'wire cable, a collar formed of ductile material mounted on said cable adjacent its end, the strands of the cable beyond said collar being reversed and compressed against the outside 01 said collar, a bushing on said cable, the end of which 110 abuts said collar, threads on said bushing and a sleeve mounted thereon, a plug in said sleeve having threads near each end thereof, a conoidal member carried by said plug, said conoidal mem= ber entering well into a conoidal recess in the 115 center of the reversed strands and extending into said collar whereby the tightening of said plug in the sleeve will compress the strands of said cable against said collar and the said sleeve.

ERNEST I. SCHWARZ. 

